Valve.



No. 862,614. 7 PATENTED AUG. 6, 1907. G. E. DAVEY.

VALVE.

APPLIOATION FILED MAR. 12, 1903.

WITNESSES 1. V VEW TOR CHARLES E. DAVEY, OF DETROIT, MICHIGAN.

VALVE Specification of Letters Patent.

Patented Aug. 6, 1907.

Application filed March 12, 1903. Serial No. 147,374.

' To all whom it may concern:

Be it known that I, CHARLES E. DAVEY, a citizen of the United States,residing at Detroit, county of Wayne, State of Michigan, have inventeda. certain new and useful Improvement in Valves, and declare thefollowing to be a full, clear, and exact description of the same, suchas will enable others skilled in the art to which it pertains to makeand use the same, reference being had to the accompanying drawings,which form a part of this specification.

My invention relates to valves, and the object of my improvements is toprovide an improved valve adapted to act as a check valve or positiveclosed valve. This improved valve may be transformed into a valveoperable only by manipulation. I secure this object in the valveillustrated in the accompanying drawing, in which,

Figure 1, is a cross section. Figs. 2, 3 and 4, are details of the partsforming the joint between the two parts of the valve stem. Fig. 5 is asection of the joint between the two parts of the valve stem with theblock in place which takes up the lost motion between said parts of thevalve stem, so that the valve can be operated as a simple hand actuatedvalve.

A, is the valve casing, having formed therein the usual partition A A isa nipple extending above the valve casing A screw-threaded on theoutside and having a cylindrieal opening A therein. Axially in line withthe opening A is a screw-threaded opening A in the partition A I B, is acylinder having a cylindrical opening B in its upper portion and havinga valve seat B formed at its lower end. The cylinder B is adapted at Bto screw into the opening A, the valve seat at its lower end extendingbelow the partition A A, is a cap adapted to screw upon the nipple A toclose the opening A.

B, indicates holes tln'ough the walls of the cylinder B at the part ofsaid walls that come just above the partition A O, is a valve diskadapted to seat upwards against the valve seat 13''.

O is a valve stem extending upward from the valve 0 into the cylinder Band provided at its upper end with a cylindrical portion 0 adapted tofit and slide in the cylinder B. The lower end of this cylindricalportion is exposed to the pressure of the fluid in the valve casing,which has a tendency to close the valve when the pressure in the casingincreases. The cylindrical portion 0 of the valve stem 0 has a chamber 0formed therein and is cut away at one side to form an entrance to thechamber O", as most distinctly indicated in Fig. 2.

C", is a slot extending inward from the periphery of the upper end ofthe cylindrical portion 0 ol' the valve stem 0 D, is a spindle extendingaxially in line with the valve stem C its lower end extending into theslot G.

D is a disk, or enlargement on the end of the spindle D within thechamber C but 01' less thickness than the height of said chamber. Theupper surface of the disk D is adapted to engage against the upper endof the cylindrical portion C of the valve stem C and against the lowerend of said cylindrical portion leaving some distance between these twoengagements, thus the spindle D is engaged with the valve stem C so thatit may turn independent thereof and so that it will have considerablelost motion in the direction oi the axes of said valve stem and spindle.

C is a block adapted to be inserted within the chamber C under the diskD, to prevent any lost motion between the valve stem C and spindle D inthe direction of their axes. The joint between the valve stem with theblock O in place is shown in Fig. 5.

A", is a gland surrounding the spindle D, its threads engaging withthreads upon the cap A and forming a tight joint around said spindle.

D are screw threads upon the spindle D adapted to engage with screwthreads A in the cap A.

D is a hand wheel on the outer end of the spindle D.

The operation of the above described device is as followsr-When the spin(110 D is turned so as to draw the valve O firmly against its seat, thevalve is closed so as to prevent passage of water in the directionindicated by the arrow in Figs. 1 and 2. When the spindle D is turned bymeans of the wheel D so as to bring it to a lower and intermediateposition, the valve 0 is free to open to a pressure having that tendencybut acts as a check or non-return valve to prevent the passage of fluidunder a back pressure. When the spindle D is turned to its lowestposition, the disk D strikes against the upper end of the stem 0 or thelower end of the cylindrical portion C forcing the valve G away from itsseat and'holding it away from its seat as long as the spindle D is inthis position. When the block 0'' is inserted in the chamber 0 under thedisk D the spindle D is free to turn independently of the valve stem Cbut cannot move in the direction of its axis without carrying the stem 0and the valve 0 along with it so that with this arrangement the valve 0is no longer adapted to act as a check valve but the spindle D and stemC form substantially a single stem except that they may be rotatedindependently of each other, and the valve is adapted to be operatedonly by handv The above device may obviously be applied to av faucetwithout departing from my invention.

By the above construction the valve is accurately guided by a stationaryguide and is readily and cheaply constructed 'to accurately lit theguide, and the construction which adapts the valve stem to the guideaffords facilities for the joint between the spindle and the stem.

What I claim is:

The combination of a casing having a valve seat surrounding a porttherein and provided with a passage in line with said port adapted toact as a gnideway, a valve disk adapted to seat upon said valve-seat, astem extending from said disk and provided with an enlargement at itsend remote from the'valve disk, said enlargement being adapted to slidein, and engage with the Walls of said passage and having a chamberformed therein, a spindle extending; into said chamber and provided withan enlargement in said chamber of less thickness than the height of saidchamber, said chamber being open at one side, and a block adapted to beinserted through said opening into said chamber under the end of saidspindle and retained therein by the Walls of said passage.

In testimony whereof, I sign this specification in the presence of twowitnesses.

CHARLES E. DAVEY.

Witnesses ELLIOTT .T. STODDARD, ROBERT C. RUDY.

